[Arran]

Yes, that 0.015uF from the AC line to ground should be a Y type safety cap and it's the only one in this set. Safety caps are designed to fail safely (i.e. not burst into flames or explode!) if there is a power surge.

Back in the days when they designed and built these radios there were no such thing as safety caps. They just used the same old paper caps as used in the rest of the radio circuits.

Or you can move that .015 uf cap to the radio side of the power switch and not worry about whether it's a safety cap or not since it will no longer be energized while the set is turned off. The only reason it's there is to block noise from the power line, RCA and some other makes did not bother using them on their sets since they used an electrostatic sheild inside the transformer.
Regards
Arran